Connecting base



FIG. 1 is a perspective view of a connecting base showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a front view thereof showing the connecting base mounted on a bending stand with an electronic device mounted on;

FIG. 10 is another front view thereof showing the connecting base mounted on the bending stand with the electronic device mounted on;

FIG. 11 is a front view thereof showing the connecting base mounted on a upright stand with the electronic device mounted on; and,

FIG. 12 is another front view thereof showing the connecting base mounted on the upright stand with the electronic device mounted on.

The dashed broken lines illustrate portions of the connecting base that form no part of the claimed design. The dashed broken lines showing the bending stand, the upright stand and the electronic device in FIG. 9, FIG. 10, FIG. 11 and FIG. 12 are for the purpose of illustrating environmental structure, and form no part of the claimed design. 

CLAIM The ornamental design for a connecting base, as shown and described. 